B&S z-start 6.5 won't start.

[sadears]

Worked just fine a couple weeks ago. Started for a second, then quit. Replaced spark plug. Gas and oil and good. Clueless.

 

[mechanic mark]

Check air filter for replacement & adjust valves per specs. in manual:Engine

https://www.google.com/webhp?source...espv=2&ie=UTF-8#q=adjusting valves b&s engine

 

[snzip]

I'm guessing carb diaphragm ...... Dean